<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
	<script type="text/javascript" src="../script/jquery-1.7.2.js"></script>
	<script type="text/javascript">
		window.onload = function () {
			const byId = document.getElementById("btnId");
			byId.onclick = function () {
				alert("js原生的单击事件！");
			}
		}

		$(function () { //表示页面加载完成之后，相当window.onload = function () {}
			const $btnId = $("#btnId");//表示按id查询标签对象
			$btnId.click(function () {//绑定单击事件
				alert("Jquery 的单击事件");
			})
		})

		$(function () {
			const $btnId1 = $("#btnId");
			$btnId1.click(function () {
				alert("666666");
			})
		})


	</script>




</head>
<body>

	<button id="btnId">SayHello</button>

</body>
</html>